IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.2.120.0/22

network10.2.120.0/22

broadcast10.2.123.255

first host10.2.120.1

last host10.2.123.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.120.0/22

address00001010.00000010.01111000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.01111000.00000000

broadcast00001010.00000010.01111011.11111111

green = network part, grey = host part

hex0x0a027800

decimal167933952

reverse dns0.120.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:7800

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.120.0/30	10.2.120.1 – 10.2.120.2	10.2.120.3
2	10.2.120.4/30	10.2.120.5 – 10.2.120.6	10.2.120.7
3	10.2.120.8/30	10.2.120.9 – 10.2.120.10	10.2.120.11
4	10.2.120.12/30	10.2.120.13 – 10.2.120.14	10.2.120.15
5	10.2.120.16/30	10.2.120.17 – 10.2.120.18	10.2.120.19
6	10.2.120.20/30	10.2.120.21 – 10.2.120.22	10.2.120.23
7	10.2.120.24/30	10.2.120.25 – 10.2.120.26	10.2.120.27
8	10.2.120.28/30	10.2.120.29 – 10.2.120.30	10.2.120.31
9	10.2.120.32/30	10.2.120.33 – 10.2.120.34	10.2.120.35
10	10.2.120.36/30	10.2.120.37 – 10.2.120.38	10.2.120.39
11	10.2.120.40/30	10.2.120.41 – 10.2.120.42	10.2.120.43
12	10.2.120.44/30	10.2.120.45 – 10.2.120.46	10.2.120.47
13	10.2.120.48/30	10.2.120.49 – 10.2.120.50	10.2.120.51
14	10.2.120.52/30	10.2.120.53 – 10.2.120.54	10.2.120.55
15	10.2.120.56/30	10.2.120.57 – 10.2.120.58	10.2.120.59
16	10.2.120.60/30	10.2.120.61 – 10.2.120.62	10.2.120.63
17	10.2.120.64/30	10.2.120.65 – 10.2.120.66	10.2.120.67
18	10.2.120.68/30	10.2.120.69 – 10.2.120.70	10.2.120.71
19	10.2.120.72/30	10.2.120.73 – 10.2.120.74	10.2.120.75
20	10.2.120.76/30	10.2.120.77 – 10.2.120.78	10.2.120.79
21	10.2.120.80/30	10.2.120.81 – 10.2.120.82	10.2.120.83
22	10.2.120.84/30	10.2.120.85 – 10.2.120.86	10.2.120.87
23	10.2.120.88/30	10.2.120.89 – 10.2.120.90	10.2.120.91
24	10.2.120.92/30	10.2.120.93 – 10.2.120.94	10.2.120.95
25	10.2.120.96/30	10.2.120.97 – 10.2.120.98	10.2.120.99
26	10.2.120.100/30	10.2.120.101 – 10.2.120.102	10.2.120.103
27	10.2.120.104/30	10.2.120.105 – 10.2.120.106	10.2.120.107
28	10.2.120.108/30	10.2.120.109 – 10.2.120.110	10.2.120.111
29	10.2.120.112/30	10.2.120.113 – 10.2.120.114	10.2.120.115
30	10.2.120.116/30	10.2.120.117 – 10.2.120.118	10.2.120.119
31	10.2.120.120/30	10.2.120.121 – 10.2.120.122	10.2.120.123
32	10.2.120.124/30	10.2.120.125 – 10.2.120.126	10.2.120.127
33	10.2.120.128/30	10.2.120.129 – 10.2.120.130	10.2.120.131
34	10.2.120.132/30	10.2.120.133 – 10.2.120.134	10.2.120.135
35	10.2.120.136/30	10.2.120.137 – 10.2.120.138	10.2.120.139
36	10.2.120.140/30	10.2.120.141 – 10.2.120.142	10.2.120.143
37	10.2.120.144/30	10.2.120.145 – 10.2.120.146	10.2.120.147
38	10.2.120.148/30	10.2.120.149 – 10.2.120.150	10.2.120.151
39	10.2.120.152/30	10.2.120.153 – 10.2.120.154	10.2.120.155
40	10.2.120.156/30	10.2.120.157 – 10.2.120.158	10.2.120.159
41	10.2.120.160/30	10.2.120.161 – 10.2.120.162	10.2.120.163
42	10.2.120.164/30	10.2.120.165 – 10.2.120.166	10.2.120.167
43	10.2.120.168/30	10.2.120.169 – 10.2.120.170	10.2.120.171
44	10.2.120.172/30	10.2.120.173 – 10.2.120.174	10.2.120.175
45	10.2.120.176/30	10.2.120.177 – 10.2.120.178	10.2.120.179
46	10.2.120.180/30	10.2.120.181 – 10.2.120.182	10.2.120.183
47	10.2.120.184/30	10.2.120.185 – 10.2.120.186	10.2.120.187
48	10.2.120.188/30	10.2.120.189 – 10.2.120.190	10.2.120.191
49	10.2.120.192/30	10.2.120.193 – 10.2.120.194	10.2.120.195
50	10.2.120.196/30	10.2.120.197 – 10.2.120.198	10.2.120.199
51	10.2.120.200/30	10.2.120.201 – 10.2.120.202	10.2.120.203
52	10.2.120.204/30	10.2.120.205 – 10.2.120.206	10.2.120.207
53	10.2.120.208/30	10.2.120.209 – 10.2.120.210	10.2.120.211
54	10.2.120.212/30	10.2.120.213 – 10.2.120.214	10.2.120.215
55	10.2.120.216/30	10.2.120.217 – 10.2.120.218	10.2.120.219
56	10.2.120.220/30	10.2.120.221 – 10.2.120.222	10.2.120.223
57	10.2.120.224/30	10.2.120.225 – 10.2.120.226	10.2.120.227
58	10.2.120.228/30	10.2.120.229 – 10.2.120.230	10.2.120.231
59	10.2.120.232/30	10.2.120.233 – 10.2.120.234	10.2.120.235
60	10.2.120.236/30	10.2.120.237 – 10.2.120.238	10.2.120.239
61	10.2.120.240/30	10.2.120.241 – 10.2.120.242	10.2.120.243
62	10.2.120.244/30	10.2.120.245 – 10.2.120.246	10.2.120.247
63	10.2.120.248/30	10.2.120.249 – 10.2.120.250	10.2.120.251
64	10.2.120.252/30	10.2.120.253 – 10.2.120.254	10.2.120.255
65	10.2.121.0/30	10.2.121.1 – 10.2.121.2	10.2.121.3
66	10.2.121.4/30	10.2.121.5 – 10.2.121.6	10.2.121.7
67	10.2.121.8/30	10.2.121.9 – 10.2.121.10	10.2.121.11
68	10.2.121.12/30	10.2.121.13 – 10.2.121.14	10.2.121.15
69	10.2.121.16/30	10.2.121.17 – 10.2.121.18	10.2.121.19
70	10.2.121.20/30	10.2.121.21 – 10.2.121.22	10.2.121.23
71	10.2.121.24/30	10.2.121.25 – 10.2.121.26	10.2.121.27
72	10.2.121.28/30	10.2.121.29 – 10.2.121.30	10.2.121.31
73	10.2.121.32/30	10.2.121.33 – 10.2.121.34	10.2.121.35
74	10.2.121.36/30	10.2.121.37 – 10.2.121.38	10.2.121.39
75	10.2.121.40/30	10.2.121.41 – 10.2.121.42	10.2.121.43
76	10.2.121.44/30	10.2.121.45 – 10.2.121.46	10.2.121.47
77	10.2.121.48/30	10.2.121.49 – 10.2.121.50	10.2.121.51
78	10.2.121.52/30	10.2.121.53 – 10.2.121.54	10.2.121.55
79	10.2.121.56/30	10.2.121.57 – 10.2.121.58	10.2.121.59
80	10.2.121.60/30	10.2.121.61 – 10.2.121.62	10.2.121.63
81	10.2.121.64/30	10.2.121.65 – 10.2.121.66	10.2.121.67
82	10.2.121.68/30	10.2.121.69 – 10.2.121.70	10.2.121.71
83	10.2.121.72/30	10.2.121.73 – 10.2.121.74	10.2.121.75
84	10.2.121.76/30	10.2.121.77 – 10.2.121.78	10.2.121.79
85	10.2.121.80/30	10.2.121.81 – 10.2.121.82	10.2.121.83
86	10.2.121.84/30	10.2.121.85 – 10.2.121.86	10.2.121.87
87	10.2.121.88/30	10.2.121.89 – 10.2.121.90	10.2.121.91
88	10.2.121.92/30	10.2.121.93 – 10.2.121.94	10.2.121.95
89	10.2.121.96/30	10.2.121.97 – 10.2.121.98	10.2.121.99
90	10.2.121.100/30	10.2.121.101 – 10.2.121.102	10.2.121.103
91	10.2.121.104/30	10.2.121.105 – 10.2.121.106	10.2.121.107
92	10.2.121.108/30	10.2.121.109 – 10.2.121.110	10.2.121.111
93	10.2.121.112/30	10.2.121.113 – 10.2.121.114	10.2.121.115
94	10.2.121.116/30	10.2.121.117 – 10.2.121.118	10.2.121.119
95	10.2.121.120/30	10.2.121.121 – 10.2.121.122	10.2.121.123
96	10.2.121.124/30	10.2.121.125 – 10.2.121.126	10.2.121.127
97	10.2.121.128/30	10.2.121.129 – 10.2.121.130	10.2.121.131
98	10.2.121.132/30	10.2.121.133 – 10.2.121.134	10.2.121.135
99	10.2.121.136/30	10.2.121.137 – 10.2.121.138	10.2.121.139
100	10.2.121.140/30	10.2.121.141 – 10.2.121.142	10.2.121.143
101	10.2.121.144/30	10.2.121.145 – 10.2.121.146	10.2.121.147
102	10.2.121.148/30	10.2.121.149 – 10.2.121.150	10.2.121.151
103	10.2.121.152/30	10.2.121.153 – 10.2.121.154	10.2.121.155
104	10.2.121.156/30	10.2.121.157 – 10.2.121.158	10.2.121.159
105	10.2.121.160/30	10.2.121.161 – 10.2.121.162	10.2.121.163
106	10.2.121.164/30	10.2.121.165 – 10.2.121.166	10.2.121.167
107	10.2.121.168/30	10.2.121.169 – 10.2.121.170	10.2.121.171
108	10.2.121.172/30	10.2.121.173 – 10.2.121.174	10.2.121.175
109	10.2.121.176/30	10.2.121.177 – 10.2.121.178	10.2.121.179
110	10.2.121.180/30	10.2.121.181 – 10.2.121.182	10.2.121.183
111	10.2.121.184/30	10.2.121.185 – 10.2.121.186	10.2.121.187
112	10.2.121.188/30	10.2.121.189 – 10.2.121.190	10.2.121.191
113	10.2.121.192/30	10.2.121.193 – 10.2.121.194	10.2.121.195
114	10.2.121.196/30	10.2.121.197 – 10.2.121.198	10.2.121.199
115	10.2.121.200/30	10.2.121.201 – 10.2.121.202	10.2.121.203
116	10.2.121.204/30	10.2.121.205 – 10.2.121.206	10.2.121.207
117	10.2.121.208/30	10.2.121.209 – 10.2.121.210	10.2.121.211
118	10.2.121.212/30	10.2.121.213 – 10.2.121.214	10.2.121.215
119	10.2.121.216/30	10.2.121.217 – 10.2.121.218	10.2.121.219
120	10.2.121.220/30	10.2.121.221 – 10.2.121.222	10.2.121.223
121	10.2.121.224/30	10.2.121.225 – 10.2.121.226	10.2.121.227
122	10.2.121.228/30	10.2.121.229 – 10.2.121.230	10.2.121.231
123	10.2.121.232/30	10.2.121.233 – 10.2.121.234	10.2.121.235
124	10.2.121.236/30	10.2.121.237 – 10.2.121.238	10.2.121.239
125	10.2.121.240/30	10.2.121.241 – 10.2.121.242	10.2.121.243
126	10.2.121.244/30	10.2.121.245 – 10.2.121.246	10.2.121.247
127	10.2.121.248/30	10.2.121.249 – 10.2.121.250	10.2.121.251
128	10.2.121.252/30	10.2.121.253 – 10.2.121.254	10.2.121.255
129	10.2.122.0/30	10.2.122.1 – 10.2.122.2	10.2.122.3
130	10.2.122.4/30	10.2.122.5 – 10.2.122.6	10.2.122.7
131	10.2.122.8/30	10.2.122.9 – 10.2.122.10	10.2.122.11
132	10.2.122.12/30	10.2.122.13 – 10.2.122.14	10.2.122.15
133	10.2.122.16/30	10.2.122.17 – 10.2.122.18	10.2.122.19
134	10.2.122.20/30	10.2.122.21 – 10.2.122.22	10.2.122.23
135	10.2.122.24/30	10.2.122.25 – 10.2.122.26	10.2.122.27
136	10.2.122.28/30	10.2.122.29 – 10.2.122.30	10.2.122.31
137	10.2.122.32/30	10.2.122.33 – 10.2.122.34	10.2.122.35
138	10.2.122.36/30	10.2.122.37 – 10.2.122.38	10.2.122.39
139	10.2.122.40/30	10.2.122.41 – 10.2.122.42	10.2.122.43
140	10.2.122.44/30	10.2.122.45 – 10.2.122.46	10.2.122.47
141	10.2.122.48/30	10.2.122.49 – 10.2.122.50	10.2.122.51
142	10.2.122.52/30	10.2.122.53 – 10.2.122.54	10.2.122.55
143	10.2.122.56/30	10.2.122.57 – 10.2.122.58	10.2.122.59
144	10.2.122.60/30	10.2.122.61 – 10.2.122.62	10.2.122.63
145	10.2.122.64/30	10.2.122.65 – 10.2.122.66	10.2.122.67
146	10.2.122.68/30	10.2.122.69 – 10.2.122.70	10.2.122.71
147	10.2.122.72/30	10.2.122.73 – 10.2.122.74	10.2.122.75
148	10.2.122.76/30	10.2.122.77 – 10.2.122.78	10.2.122.79
149	10.2.122.80/30	10.2.122.81 – 10.2.122.82	10.2.122.83
150	10.2.122.84/30	10.2.122.85 – 10.2.122.86	10.2.122.87
151	10.2.122.88/30	10.2.122.89 – 10.2.122.90	10.2.122.91
152	10.2.122.92/30	10.2.122.93 – 10.2.122.94	10.2.122.95
153	10.2.122.96/30	10.2.122.97 – 10.2.122.98	10.2.122.99
154	10.2.122.100/30	10.2.122.101 – 10.2.122.102	10.2.122.103
155	10.2.122.104/30	10.2.122.105 – 10.2.122.106	10.2.122.107
156	10.2.122.108/30	10.2.122.109 – 10.2.122.110	10.2.122.111
157	10.2.122.112/30	10.2.122.113 – 10.2.122.114	10.2.122.115
158	10.2.122.116/30	10.2.122.117 – 10.2.122.118	10.2.122.119
159	10.2.122.120/30	10.2.122.121 – 10.2.122.122	10.2.122.123
160	10.2.122.124/30	10.2.122.125 – 10.2.122.126	10.2.122.127
161	10.2.122.128/30	10.2.122.129 – 10.2.122.130	10.2.122.131
162	10.2.122.132/30	10.2.122.133 – 10.2.122.134	10.2.122.135
163	10.2.122.136/30	10.2.122.137 – 10.2.122.138	10.2.122.139
164	10.2.122.140/30	10.2.122.141 – 10.2.122.142	10.2.122.143
165	10.2.122.144/30	10.2.122.145 – 10.2.122.146	10.2.122.147
166	10.2.122.148/30	10.2.122.149 – 10.2.122.150	10.2.122.151
167	10.2.122.152/30	10.2.122.153 – 10.2.122.154	10.2.122.155
168	10.2.122.156/30	10.2.122.157 – 10.2.122.158	10.2.122.159
169	10.2.122.160/30	10.2.122.161 – 10.2.122.162	10.2.122.163
170	10.2.122.164/30	10.2.122.165 – 10.2.122.166	10.2.122.167
171	10.2.122.168/30	10.2.122.169 – 10.2.122.170	10.2.122.171
172	10.2.122.172/30	10.2.122.173 – 10.2.122.174	10.2.122.175
173	10.2.122.176/30	10.2.122.177 – 10.2.122.178	10.2.122.179
174	10.2.122.180/30	10.2.122.181 – 10.2.122.182	10.2.122.183
175	10.2.122.184/30	10.2.122.185 – 10.2.122.186	10.2.122.187
176	10.2.122.188/30	10.2.122.189 – 10.2.122.190	10.2.122.191
177	10.2.122.192/30	10.2.122.193 – 10.2.122.194	10.2.122.195
178	10.2.122.196/30	10.2.122.197 – 10.2.122.198	10.2.122.199
179	10.2.122.200/30	10.2.122.201 – 10.2.122.202	10.2.122.203
180	10.2.122.204/30	10.2.122.205 – 10.2.122.206	10.2.122.207
181	10.2.122.208/30	10.2.122.209 – 10.2.122.210	10.2.122.211
182	10.2.122.212/30	10.2.122.213 – 10.2.122.214	10.2.122.215
183	10.2.122.216/30	10.2.122.217 – 10.2.122.218	10.2.122.219
184	10.2.122.220/30	10.2.122.221 – 10.2.122.222	10.2.122.223
185	10.2.122.224/30	10.2.122.225 – 10.2.122.226	10.2.122.227
186	10.2.122.228/30	10.2.122.229 – 10.2.122.230	10.2.122.231
187	10.2.122.232/30	10.2.122.233 – 10.2.122.234	10.2.122.235
188	10.2.122.236/30	10.2.122.237 – 10.2.122.238	10.2.122.239
189	10.2.122.240/30	10.2.122.241 – 10.2.122.242	10.2.122.243
190	10.2.122.244/30	10.2.122.245 – 10.2.122.246	10.2.122.247
191	10.2.122.248/30	10.2.122.249 – 10.2.122.250	10.2.122.251
192	10.2.122.252/30	10.2.122.253 – 10.2.122.254	10.2.122.255
193	10.2.123.0/30	10.2.123.1 – 10.2.123.2	10.2.123.3
194	10.2.123.4/30	10.2.123.5 – 10.2.123.6	10.2.123.7
195	10.2.123.8/30	10.2.123.9 – 10.2.123.10	10.2.123.11
196	10.2.123.12/30	10.2.123.13 – 10.2.123.14	10.2.123.15
197	10.2.123.16/30	10.2.123.17 – 10.2.123.18	10.2.123.19
198	10.2.123.20/30	10.2.123.21 – 10.2.123.22	10.2.123.23
199	10.2.123.24/30	10.2.123.25 – 10.2.123.26	10.2.123.27
200	10.2.123.28/30	10.2.123.29 – 10.2.123.30	10.2.123.31
201	10.2.123.32/30	10.2.123.33 – 10.2.123.34	10.2.123.35
202	10.2.123.36/30	10.2.123.37 – 10.2.123.38	10.2.123.39
203	10.2.123.40/30	10.2.123.41 – 10.2.123.42	10.2.123.43
204	10.2.123.44/30	10.2.123.45 – 10.2.123.46	10.2.123.47
205	10.2.123.48/30	10.2.123.49 – 10.2.123.50	10.2.123.51
206	10.2.123.52/30	10.2.123.53 – 10.2.123.54	10.2.123.55
207	10.2.123.56/30	10.2.123.57 – 10.2.123.58	10.2.123.59
208	10.2.123.60/30	10.2.123.61 – 10.2.123.62	10.2.123.63
209	10.2.123.64/30	10.2.123.65 – 10.2.123.66	10.2.123.67
210	10.2.123.68/30	10.2.123.69 – 10.2.123.70	10.2.123.71
211	10.2.123.72/30	10.2.123.73 – 10.2.123.74	10.2.123.75
212	10.2.123.76/30	10.2.123.77 – 10.2.123.78	10.2.123.79
213	10.2.123.80/30	10.2.123.81 – 10.2.123.82	10.2.123.83
214	10.2.123.84/30	10.2.123.85 – 10.2.123.86	10.2.123.87
215	10.2.123.88/30	10.2.123.89 – 10.2.123.90	10.2.123.91
216	10.2.123.92/30	10.2.123.93 – 10.2.123.94	10.2.123.95
217	10.2.123.96/30	10.2.123.97 – 10.2.123.98	10.2.123.99
218	10.2.123.100/30	10.2.123.101 – 10.2.123.102	10.2.123.103
219	10.2.123.104/30	10.2.123.105 – 10.2.123.106	10.2.123.107
220	10.2.123.108/30	10.2.123.109 – 10.2.123.110	10.2.123.111
221	10.2.123.112/30	10.2.123.113 – 10.2.123.114	10.2.123.115
222	10.2.123.116/30	10.2.123.117 – 10.2.123.118	10.2.123.119
223	10.2.123.120/30	10.2.123.121 – 10.2.123.122	10.2.123.123
224	10.2.123.124/30	10.2.123.125 – 10.2.123.126	10.2.123.127
225	10.2.123.128/30	10.2.123.129 – 10.2.123.130	10.2.123.131
226	10.2.123.132/30	10.2.123.133 – 10.2.123.134	10.2.123.135
227	10.2.123.136/30	10.2.123.137 – 10.2.123.138	10.2.123.139
228	10.2.123.140/30	10.2.123.141 – 10.2.123.142	10.2.123.143
229	10.2.123.144/30	10.2.123.145 – 10.2.123.146	10.2.123.147
230	10.2.123.148/30	10.2.123.149 – 10.2.123.150	10.2.123.151
231	10.2.123.152/30	10.2.123.153 – 10.2.123.154	10.2.123.155
232	10.2.123.156/30	10.2.123.157 – 10.2.123.158	10.2.123.159
233	10.2.123.160/30	10.2.123.161 – 10.2.123.162	10.2.123.163
234	10.2.123.164/30	10.2.123.165 – 10.2.123.166	10.2.123.167
235	10.2.123.168/30	10.2.123.169 – 10.2.123.170	10.2.123.171
236	10.2.123.172/30	10.2.123.173 – 10.2.123.174	10.2.123.175
237	10.2.123.176/30	10.2.123.177 – 10.2.123.178	10.2.123.179
238	10.2.123.180/30	10.2.123.181 – 10.2.123.182	10.2.123.183
239	10.2.123.184/30	10.2.123.185 – 10.2.123.186	10.2.123.187
240	10.2.123.188/30	10.2.123.189 – 10.2.123.190	10.2.123.191
241	10.2.123.192/30	10.2.123.193 – 10.2.123.194	10.2.123.195
242	10.2.123.196/30	10.2.123.197 – 10.2.123.198	10.2.123.199
243	10.2.123.200/30	10.2.123.201 – 10.2.123.202	10.2.123.203
244	10.2.123.204/30	10.2.123.205 – 10.2.123.206	10.2.123.207
245	10.2.123.208/30	10.2.123.209 – 10.2.123.210	10.2.123.211
246	10.2.123.212/30	10.2.123.213 – 10.2.123.214	10.2.123.215
247	10.2.123.216/30	10.2.123.217 – 10.2.123.218	10.2.123.219
248	10.2.123.220/30	10.2.123.221 – 10.2.123.222	10.2.123.223
249	10.2.123.224/30	10.2.123.225 – 10.2.123.226	10.2.123.227
250	10.2.123.228/30	10.2.123.229 – 10.2.123.230	10.2.123.231
251	10.2.123.232/30	10.2.123.233 – 10.2.123.234	10.2.123.235
252	10.2.123.236/30	10.2.123.237 – 10.2.123.238	10.2.123.239
253	10.2.123.240/30	10.2.123.241 – 10.2.123.242	10.2.123.243
254	10.2.123.244/30	10.2.123.245 – 10.2.123.246	10.2.123.247
255	10.2.123.248/30	10.2.123.249 – 10.2.123.250	10.2.123.251
256	10.2.123.252/30	10.2.123.253 – 10.2.123.254	10.2.123.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /22
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →